GB/T 33593-2017 English PDF (GBT33593-2017)

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GB/T 33593-2017: Technical requirements for grid connection of distributed resources
GB/T 33593-2017
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 29
F 21
Technical requirements for
grid connection of distributed resources
ISSUED ON. MAY 12, 2017
IMPLEMENTED ON. DECEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
3. No action is required - Full-copy of this standard will be automatically and
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Table of contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Power quality ... 6 
5 Power control and voltage regulation ... 7 
6 Start and stop ... 9 
7 Operational adaptability ... 9 
8 Safety ... 11 
9 Relay protection and safety automatic device ... 11 
10 Communication and information ... 13 
11 Energy metering ... 14 
12 Power grid connection testing ... 14 
Appendix A (Informative) Schematics of power grid connection point and point
of common coupling ... 16 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard was proposed by AND shall be under the jurisdiction of the
China Electricity Council.
The drafting organizations of this standard. China Electric Power Research
Institute, China Power Puri Zhang North Wind Power Research and Testing
Co., Ltd.
The main drafters of this standard. Liu Chun, He Guoqing, Li Guanghui, Feng
Kaihui, Zhao Weiran, Chi Yongning, Wang Weisheng, Wang Haijiao, Hao
Mukai, Sun Yanxia, Sun Wenwen.
Technical requirements for
grid connection of distributed resources
1 Scope
This standard specifies the general principles and technical requirements that
shall be followed in the design, construction and operation of grid connection of
distributed resources.
This standard applies to the newly built, reconstructed, and extended
distributed power resources which are connected into the power grid via the 35
kV and below voltage level.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB 2894 Safety signs and guideline for the use
GB/T 12325 Power quality – Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB 14050 Types and safety technical requirements of system earthing
GB/T 14285 Technical code for relaying protection and security automatic
equipment
GB/T 14549 Quality of electric energy supply – Harmonics in public supply
network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 15945 Power quality – Frequency deviation for power system
GB/T 19862 General requirements for monitoring equipment of power
quality
GB/T 24337 Power quality – Interharmonics in public supply network
GB 50065 Code for grounding design of AC electrical installations
DL/T 448 Technical administrative code of electric energy metering
DL/T 584 Code for setting of 3kV ~ 110kV relaying protection equipment
DL/T 621 Grounding for AC electrical installations4
DL/T 634.5101 Telecontrol equipment and systems - Part 5-101.
Transmission protocols – Companion standard for basic telecontrol tasks
DL/T 634.5104 Telecontrol equipment and systems - Part 5-104.
Transmission protocols – Network access for IEC 60870-5-101 using
standard transport profiles
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Distributed resources
It refers to the resources which are connected to the power grid of 35 kV
and below voltage level, located close to the user, AND mainly consumed
locally at 35 kV and below voltage level, which includes synchronous
generators, asynchronous generators, converters, and other types of
resources.
Note. It includes solar energy, natural gas, biomass energy, wind energy,
water energy, hydrogen energy, geothermal energy, ocean energy,
comprehensive utilization of resources (including coal mine gas power
generation), and energy storage and other types.
3.2
Converter
It refers to an electrical device for converting electrical power into one or
more types of electrical powers that is suitable for use by the power grid or
user.
Note. The converter includes rectifiers, inverters, AC converters, and DC
converters.
3.3
Converter-type power supply
It refers to the power supply which is connected to the power grid totally or
partially through the converter.
3.4
Synchronous-machine-type power supply
8 Safety
8.1 General requirements
8.1.1 The grounding mode of the distributed resource shall be compatible with
the grounding mode at the power distribution network side, AND it shall comply
with the requirements of personal and equipment safety, protection, and
coordination.
8.1.2 As for the distributed resources connected to the power grid through the
380 V voltage level, it shall install a switch at the power grid connection point
which is easy to operate, have obvious on/off indication, AND have the fault
current on/off capability.
8.1.3 As for the distributed resources connected to the power grid through the
10 (6) kV ~ 35 kV voltage level, it shall install a switching equipment at the
power grid connection point which is easy to operate, can be locked, have
apparent on/off point, have grounding function, AND have the fault current
on/off capability.
8.2 Safety signs
8.2.1 As for the distributed resources connected to the power grid through the
380 V voltage level, the dedicated low voltage switchgear which is connected
to the power supply and power grid shall have eye-catching signs. The signs
shall be indicated of such suggestive text and symbol as “warning”, “dual
power supply”, etc. The shape, color, size, and height of the sign shall follow
the requirements of GB 2894.
8.2.2 As for the distributed resources connected to the power grid through the
10 (6) kV ~ 35 kV voltage level, it shall follow the requirements of GB 2894, to
indicate such suggestive text and symbol as “be careful of electric shock”, etc.,
nearby the electric equipment and circuit.
8.3 Lightning protection and grounding
The lightning protection and grounding of the distributed resource shall comply
with the relevant requirements of GB 14050 and DL/T 621.
9 Relay protection and safety automatic device
9.1 General requirements
The protection of distributed resource shall comply with the requirements of
reliability, selectivity, sensitivity and speed, AND its technical conditions shall
comply with the requirements of GB/T 14285 and DL/T 584.
9.2 Voltage protection
shall be matched with the power distribution line side re-closure and safety
automatic device action time.
10 Communication and information
10.1 General requirements
10.1.1 As for the distributed resources connected to the power grid through the
380 V voltage level AND the distributed resources connected to the user side
through the 10 (6) kV voltage level, it may use such communication methods
as wireless, optical fiber, and carrier wave, etc. When using the wireless
communication method, it shall take the information communication safety
p...